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A beaker with 175ml of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100M . A student adds 5.40ml of a 0.330M HCl solution to the beaker. How much will the pH change? The pka of acetic acid is 4.760.
At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 11.8 g of biphenyl in 25.0 g of benzene
0.101 M HNO2 solution contains 0.0067 M H+ ions at 25 oC. What is the percent ionization of this acid under these conditions
This point we have magnesium ions in solution and fluoride ions in solution. Remember the Ksp of MgF2 is equal to 3.7 x 10^-8 at room temperature
Predict which of the following compounds has the greatest lattice energy. A. SCl6 B. AlCl3 C. NaCl D. MgCl2 E. PCl5
b) Calculate Delta G^o at 800 K, assuming that Delta H^o and Delta S^o do not change with temperature. (c) Is the reaction spontaneous at 800K?
How many moles of methane (CH4) gas are in 745 mL at 25.5C and 730 torr?
You may assume that delta H and delta S are independent of temperature.
calculate the percent yield based upon the amount of maleic anhydride used. use the molecular weight of one repeating monomer unit for the weight of the product.
Ethanol is a possible fuel. Use average bond energies to calculate delta Hrxn for the combustion of ethanol.
A 6.38 mg sample of potassium hydrogen phthalate was dissolved in 50 mL of water and to use as a standardizing aging. If 36.5 mL of NaOH was required to reach the end point, what is the concentration of the solution in uM?
The mixture was analyzed spectrophotometrically and found to be 1.84*10^-3 M in I3-. Calculate the molarity of I3- in the original sample
A compound that contains only C and H was burned in excess O2 to give CO2 and H2O. When 0.270 g of the compound was burned, the amount of CO2 formed reacted completely with 20.0 mL of 2.00 M NaOH solution according to the equation:
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